Device for preventing backfiring.



L. KESSLER.

DEVICE FOR PREVENTING BACKFIRING.

APPLICATION FILED JUNE 23. [ENG- Patented Jan. 28, 1919.

2 SHEETS-SHEETI 1mm ess/e L. KESSLER.

DEVICE FOR PREVENTING BACKFIRING.

APPLICATION mgn JUN E 23. 1916.

1,292,613, Patented Jan. 28, 1919.

2 SHEETS-SHEET 2.

L 9011 5 A CSS/CF of devices for skilled in UNITED- s A s PATENT OFFICE.

LOUIS KESSLEB,

DEVICE ron. rnnvnn'rme nncxrnime.

' a licatioimedruneaa,

To all whom it may concern:

Be it known that I, LoU1s KEssLER, a cit zen of the United Statesresiding at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Devices for PreventlngBackfiring, ofwhich the'followin'gis a description.

My invention belongs to that general class use in connection withinternal combustion engines, and more articularly is a deviceforpreventing bac firing of theengine into the carbureter. The inventionhas amo its objects the production of a device o the kind described thatis simple, safe, efficient, compact, and -sat1sfactory, that may be usedwherever found applicable. As before mentioned, it is espe-"- 'ciallydesigned, and has particularly .as an object preventing. the engine fromback firing into the carburetor, but which will not mterfere with thepassage of the mixture from the carbureter to the engine, nor afeet theefliciency of the charge. Many other objects and advantages of thedevice herein illustrated will be obvious to those the art from thedisclosure herein made.

To this end my invention consists in the novel construction, arrangementand combi-' nation of parts herein shown and described,

and more particularlypointed out in the claims.

In the-drawings, whereinlike reference characters indicate" like orcorresponding parts, Y

Figure 1 is a view in elevation of anengine carburetor with one of mydevices applied thereto; L

Fig. 2 is a sectional view through my pre ferred form of device go Fig.3 is a sectional view taken substantially on line 3, 3 of Fig. 2;

Fig. 4 is a sectional view taken substantially on line 4, 4 of Fig. 2,and

Fig. 5 is a perspective view of the devicepartially disassembled.

Referring to the drawings, in which the preferred form of my device isshown, 1 repranged between the engine and carburetor,

resents any type or style of internal combustion engine, and 2any typeof carbureter, it being understood that the particular type engine andcarbureter shown are merely for illustration. My improved device is ar-Specification of Letters Patent.-

Patented Jan. 28, 1919.

1916. Serial No. 105,393.

so that the charge may bedrawn freely from the carbureter into the en e,butthe ene prevented from back ring at anytime into the carbureter.sists of a tubular shell 3 provided with the ends 4 and 5 arranged forattachment in the system between the carbureter' and engine. Arrangedwithin the shell or casing 3 is a tubular part or inner shell 6, thesame being formed with supporting or spacing ribs 7, so that spaces 8are formed betweenthe -two parts, the shell 3 and part 6. The part "6 isformed with openings 9 connecting the spaces 8 with the tubular openingin the end 4, and with a flanged portlon 10, by means ofwhich thetubular part 6 may be secured in place. As most clearly shown in Fig, 2,part 6, which is tubular, has a bore slightly greater than the intakeopening in part 4, so that a shoulder 11 is formed. A washer, 18' offiber or equivalent is preferably arranged as shown, forming a valveseat.

The device shown con- OF CHICAGO, ILLINOIS, ASSIGNOR TO NUN-EXPLOSIVEDEVICE CO. INC, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

'Slidably arranged within'part 6 is a suitably formed valve 12, which isprovided with a stem 13, the free end of which is carried by the member15. On the stem 13 and abutting against the valve, and against the part15, is arranged aspring 16, the same tendin to norma 1y maintain thevalve in the clos position shown in Fig. 2.

' In operation the end 4 is connected with the carburetor, and end 5with the engine, it being immaterial whether the device is installed asshown or vertically, and as the engine draws in a fresh charge,:the sameenters the part 4, the valve 12 being drawn back'so as to oplen theports 9, and the charge passes 'throug the ports 9, through the spaces8, past the part 15, and out through the end 5, into the intakemanifold, to'the engine. The valve is so arranged that it works freelyunder the suction of the engine, so. that the efiiciency of the engineis not in any way impaired. In case the engine back .fires, the samefires into the shell 3, but

owing to the spring 16 and the pressure ofv the gases, yalve 12 is shutand any flame prevented from reaching the carbureter.

The setting fire to. the combustible in the 0 the case of automobiles,particularly where the engine is covered with oil or there is oil in thevicinity of the flame. With the obvious that various immaterialmodifications may be made in the same withoutde parting from the spiritof my invention;

hence I do not wish to beyunderstood as limiting myself to the exactorm, construction, arrangement and combination of parts herein shown anddescribed, or uses mentioned.

e What I claim as new and desire to secure by Letters Patent is 1. Adevice of the kind described, comprising an outer shell provided with aninlet and an outlet, an inner shell open at both ends and supported inspaced relation to the outer shell and alined with the inlet, incombination with .a valve within the inner shell cooperating with theinlet, arranged to prevent reverse movement therethrough, and resilientmeans for normally holding said valve in position to close the inlet.

2. A device of the kind described, comprising an outer shell providedwith an inlet and an outlet, and an inner'shell open at both endssupportedin spaced relation to the outer shell andhavingformed thereinport openings near the inlet, in combination with a valve cooperatingwith the inlet and said port openings to regulate the passage throughthe inlet to the ports, means on the outer shell for guiding the valvein its movement, and resilient means positioned between the valve andthe guiding means for normally holding the valve in position \to closesaid port openings. i

3. A device of the kind described, am-

prising an outer shell, one end having an inlet opening therethrough andthe other end having an outlet opening therethrough, an open-ended innertubular shell supported in spaced relation to the outer shell and havingport openings formed therein near the inlet, in combination with asliding valve arranged within the inner shell formed to control theports, a valve stem connected with the valve and extending through oneopen end of said inner shell, guiding means on the outer shell for thevalve stem, and

resilient means positioned between the valve the inlet, in combinationwith a vaflve member, the front and rear faces of which are exposed tothe action of the charges passing to or from the engine, said valvebeing slid-. ingly arranged within the open-ended inner shell, resilientmeans for normally maintaining said valve in position to close theports, and guiding means for said valve, substantially as described.

In testimony whereof, I have hereunto signed my name in the presence oftwo sub-- scribing witnesses. X

A LOUIS KESSLER.

